

@empireOfLove2 @tintedundercollar12 Yeah, that absolutely looks like a hardware issue. Memtest is a good idea, but also reseat the nvme and keep an eye out for overheating (eg, ssh’ing in and keeping the following running in a terminal:
while (sleep 5); do sudo smartctl -a /dev/nvme0|grep ‘Temperature:’; done
). Components on the drive could be failing early when temperatures get high, but not high enough to trigger warning thresholds.
@Flamekebab @non_burglar Sounds like snapraid might be a better fit for your needs. Since it runs over top of the filesystem, if you lose a disk you can still access files from the other disk(s). It’s better than rsync, in that it would provide regular data validation (‘snapraid scrub’ once per week or so). It is more designed to work in raid5 rather than mirroring (raid1) setup, however.